Datasheet

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SLUS536C − AUGUST 2002 − REVISED AUGUST 2004
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5
ELECTRICAL CHARACTERISTICS (continued)
V
I(−VIN)
= −48 V with respect to RTN, V
I(EN)
= 2.8 V, V
I(INSA)
= 0 V, V
I(INSB)
= 0 V, V
I(UVLO)
= 2.5 V, V
I(OVLO)
= 0 V, V
I(ISENS)
= 0 V, all outputs
unloaded, T
A
= −40°C to 85°C (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
FAULT TIMER
V
OL
Low-level output voltage, FLTTIME V
I(EN)
= 0 V 5 mV
I
CHG
Charging current, current limit mode V
I(ISENS)
= 80 mV, V
O(FLTTIME)
= 2 V −55 −50 −45 µA
V
FLT
Fault threshold voltage 3.75 4.00 4.25 V
I
DSG
Discharge current, retry mode TPS2393 V
I(ISENS)
= 80 mV, V
O(FLTTIME)
= 2 V 0.38 0.61 µA
D Output duty cycle TPS2393 V
I(ISENS)
= 80 mV 1.0% 1.5%
I
RST
Discharge current, timer reset mode V
O(FLTTIME)
= 2 V, V
I(ISENS)
= 0 V 1 mA
POWERGOOD SENSING
V
TH
DRAINSNS threshold voltage 1.20 1.35 1.50 V
I
SRC
DRAINSNS pull-up current V
I(DRAINSNS)
= 0 V −14 −11 −8
A
I
OH
High-level output leakage current, PG output V
I(EN)
= 0 V, V
O(PG)
= 65 V 10
µ
A
R
DS(on)
Driver on-resistance, PG output
V
I(ISENS)
= 0 V, V
I(DRAINSNS)
= 0 V
I
O(PG)
= 1 mA
50 80 Ω
FAULT OUTPUT
I
OH
High-level output leakage current, FAULT V
I(EN)
= 0 V, V
O(FAULT)
= 65 V 10 µA
R
DS(on)
Driver on-resistance, FAULT
V
I(ISENS)
= 80 V, V
O(FLTTIME)
= 5 V
I
O(FAULT)
= 1 mA
50 80 Ω
(1) All voltages are with respect to the −VIN terminal, unless otherwise stated.
(2) Currents are positive into and negative out of the specified terminals.
TERMINAL FUNCTIONS
TERMINAL
I/O
DESCRIPTION
NAME PW DBT
I/O
DESCRIPTION
DRAINSNS 13 41 I Sense input for monitoring the load voltage status
EN 5 14 I Enable input to turn on/off power to the load
FAULT 4 13 O Open-drain, active-low indication of a load fault condition
FLTTIME 6 15 I/O Connection for user-programming of the fault timeout period
GATE 10 28 O Gate drive for external N−channel FET
INSA 2 1 I Insertion detection input pin A
INSB 3 7 I Insertion detection input pin B
IRAMP 7 16 I/O Programming input for setting the inrush current slew rate
ISENS 9 27 I Current sense input
OVLO 14 43 I Voltage sense input for supply overvoltage lockout (OVLO) protection
PG 12 40 O Open-drain, active-low indication of load power-good condition
RTN 11 34 I Positive supply input
UVLO 1 44 I Voltage sense input for supply undervoltage lockout (UVLO) protection
−VIN 8 22 I Negative supply input and reference pin